4.2 Flashcards
what are isomers
they are diffrent molecules formed from the same set of atoms
what are constitutionol isomers
when molecules have the same chemical formula but their atoms are connected in a different sequence
do constitutional isomers have the same chemical/biological properties
no they are very different
what is the simplest way to recognize that a pair of molecules are constitutional isomers
if they have different connectivity. they also will have completely different names
what are stereoisomers
molecules that have the same chemical formula
and their atoms are connected in the same sequence
but they differ in the three dimensional arrangement of those atoms
what is conformation
when you can interconvert by rotaing sigma bonds
what are enantiomers sterioisomer
they are a pair of stereoisomers that are a non-suerposable mirror images of eachother
(think hands)
what is superposable sterioisomer
imagine a ball infront of a mirror if you could take the mirror image and overlap it onto original ball they would coincide exactly
what would your hands be in relation to eachother
they would not coincide exactly and therefore would be nonsuperposable
what is chiral
non-superimposable (aren’t the same if flipped around)
how would you determine if a molecule is chiral or achiral
to build a molecule (or draw) the two mirror images and compare them
what can you do to a molecule to compare them
you can flip them, and change their 3D conformation
